obama will address the bombings later today. although i must emphasize nothing official on the president's schedule. >> we should anticipate that as we get more information, our teams will provide you briefings. we're still on the investigation stage at this point, but i want to reiterate, we will find out who did this and we will hold them accountable. >> in a couple of hours, the president will receive the presidential daily briefing, the global summary of all intelligence and the president wants to know charlie what was learned overnight and what threats if any might be linked back to the boston bombings. >> major, the president did not call it an act of terrorism, many people are. the reason for the white house holding back or the president specifically holding back? >> those closest to the president say the president didn't want to invoke the word to get ahead of the facts or evidence in the case. it was clear after the president's remarks no, doubt that this was an act of terror. two bombs going off with some kind of synch